HST imaging of the inner 3 arcseconds of NGC 1068 in the light of forbidden O III 5007 A

Details HST imaging of the inner 3 arcseconds of NGC 1068 in the light of forbidden O III 5007 A HST imaging of the inner 3 arcseconds of NGC 1068 in the light of forbidden O III 5007 A

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...369l..27e&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 369, March 10, 1991, p. L27-L30.

Astronomy and Astrophysics

Astrophysics

174

Emission Spectra, Forbidden Transitions, Oxygen Spectra, Seyfert Galaxies, Barred Galaxies, Galactic Nuclei, Hubble Space Telescope, Image Processing, Line Spectra, Visible Spectrum

Scientific paper

The Planetary Camera aboard HST has been used to obtain a high spatial resolution forbidden O III 5007 A image of the nucleus of the barred spiral galaxy NGC 1068. This image shows more detail than any previously published images and resolves the NLR into several distinct clouds arranged in an apparently conical geometry. The individual emission-line regions appear to be resolved with sizes of 0.1-0.2 arcsec. There is a strong apparent correspondence between the 1.3 cm radio structure and several of the forbidden O III 5007 A clouds, although there are also bright emission-line clouds for which there are no radio counterparts. In particular, the radio 'triple' of Ulvestad et al. (1987) appears to correspond directly to the forbidden O III 5007 A clouds A-D. It is concluded that the distribution of the clouds is consistent with ionization core models. The hidden nucleus is located somewhere in the southern radio component and may be coincident with the H2O megamaser.

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